Mitochondrial superoxide dismutase deficiency accelerates chronological aging in the fission yeast Schizosaccharomyces pombe.

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  • Additional Information
    • Source:
      Publisher: Chichester Country of Publication: England NLM ID: 9307129 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8355 (Electronic) Linking ISSN: 10656995 NLM ISO Abbreviation: Cell Biol Int Subsets: MEDLINE
    • Publication Information:
      Publication: 2013- : John Wiley & Sons Chichester :
      Original Publication: London, UK : Published for the International Federation for Cell Biology by Academic Press, c1993-
    • Subject Terms:
      Aging/*metabolism ; Schizosaccharomyces/*enzymology ; Schizosaccharomyces pombe Proteins/*metabolism ; Superoxide Dismutase/*deficiency; Antioxidants/metabolism ; DNA, Fungal/genetics ; Mitochondria/metabolism ; Mutation ; Mutation Rate ; Oxidative Stress/physiology ; Reactive Oxygen Species/metabolism ; Schizosaccharomyces/cytology ; Schizosaccharomyces/genetics ; Schizosaccharomyces pombe Proteins/genetics ; Superoxide Dismutase/genetics ; Superoxide Dismutase/metabolism ; Superoxides/metabolism
    • Abstract:
      A mitochondrial superoxide dismutase (SOD2) is the first line of antioxidant defense against mitochondrial superoxide. Even though the involvement of SOD2 in lifespan has been studied extensively in several organisms, characterization of the aging process has not been performed for the sod2 mutant (sod2Δ) of a prominent model Schizosaccharomyces pombe. In this study, we measured the chronological lifespan of sod2Δ cells by their ability to survive in long-term culture. SOD2 deficiency drastically decreased cell viability in the stationary phase. The mutation frequency of nuclear DNA in sod2Δ was elevated in the stationary phase, and cellular proteins and nuclear DNA were extensively degraded, concurrent with cell death. The sod2 gene in wild-type cells could be induced by an increase in endogenous oxidative stresses, after which, SOD2 activity was substantially elevated during the stationary phase. Culture in a lower glucose concentration (calorie restriction) prominently extended the sod2Δ lifespan. Therefore, S. pombe SOD2 plays a critical role in longevity through its upregulation in the non-dividing phase.
      (© 2015 International Federation for Cell Biology.)
    • Contributed Indexing:
      Keywords: Schizosaccharomyces pombe; calorie restriction; chronological lifespan; mitochondrial SOD; oxidative damage
    • Accession Number:
      0 (Antioxidants)
      0 (DNA, Fungal)
      0 (Reactive Oxygen Species)
      0 (Schizosaccharomyces pombe Proteins)
      11062-77-4 (Superoxides)
      EC 1.15.1.1 (Superoxide Dismutase)
      EC 1.15.1.1 (superoxide dismutase 2)
    • Publication Date:
      Date Created: 20151029 Date Completed: 20161213 Latest Revision: 20161230
    • Publication Date:
      20240829
    • Accession Number:
      10.1002/cbin.10556
    • Accession Number:
      26507459